In each record in the zone, there is a Time To Live (TTL) value that specifies (in seconds) how long a resolver should cache the record.
One technique to reduce the time it takes for changes to propagate is to reduce the TTL value in the current zone prior to making changes, however the change in the TTL on the record itself will take the length of time specified in original TTL value to propagate before propagation period is lowered for further changes.
During the first 48 hours, even if you are able to see your site on the new server, your next door neighbor might still be seeing the site on the old server.
DNS records function similar to a phone book, relating domain names with IP addresses so that these services can be reached.
(‘Update All’ requires the Pro version – you’ll be prompted to upgrade when you click Update All – Pro comes with full support and a 30-day money back guarantee.) To update your drivers manually, for each device, visit the manufacturer’s website and searching for the most recent correct driver for your operating system.
Note that for some drivers, you may need to try both the manufacturer of your PC and also the manufacturer of the component itself.
This means that all custom TTL records set will unfortunately not be honored, as Host Gator does not allow custom TTL.
Additionally, most computers cache DNS which can cause the computer to "remember" the old IP address for up to 48 hours until the next time it updates.